between president obama and governor mitt romney. >>> dvr sanjay gupta looking at the health care plan of president obama and mitt romney. >> reporter: since president obama's health care law was enacted 3.1 million penal under the age of 26 are now covered under their parents plan. seniors in particular have benefitted on prescription drugs. >> seniors who fall in the coverage gap known as the doughnut hole will start getting some help. they'll receive $250 to help pay for prescriptions and that will in time fill in the doughnut hole. >> reporter: 5.5 million seasons have saved $4.5 billion prescription drugs since the law was enacted. >> i have strengthened medicare, we have added years to the life of medicare, we did it business getting rid of taxpayer subsidies to insurance companies that weren't making people healthy. >> reporter: by 2017, the law requires everyone to have health insurance, whether they purchase it themselves or through employers and insurance companies can't deny you if you have a pre-exiexisting conditio. >> but the supreme court ruled in june that it was up to
